Steam-boiler and furnace therefor.



R. JOY.

STEAM BOILER AND FURNACE THEREFOR. APPLICATION FILED JAN.16,191 5.

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4 SHEETSSHEET 1.

THE COLUMBIA PLANOGRAPH c0.. WASHINGTON, D. c.

R. .IOY.

STEAM BOILER AND FURNACE THEREFOR.

APPLICATION FILED JAN. 16, \915- Patented Mar. 7, 1916.

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STEAM BOILER AND FURNACE THEREFOR.

APPLICATION FILED JAN-16,1915.

1,174,583. Patented Mar. 7,1916.

4 SHEETS-SHEET 3.

, R. JOY.

STEAM BOILER AND FURNACE THEREFOR.

APPLICATION FILED JAN. 16. 1915 1,174,583. 0 Patented Mar. 7, 1916.

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ROBERT JOY, OF OSWEGO, NEW YGRK, ASSIGNOR T0 THOMAS P. KINGSFORD AND VIRGINIA K. HIGGINS, BOTH OF O$WEGO, NE'WYGRK.

STEAM-BOILER AND FURNACE THEREFOR.

Specification of Letters Patent.

Patented Mar. 2', 1916.

Application filed January 16, 1915. Serial No. 2,702.

To all whom it may concern:

Be it known that I, ROBERT JOY, a citizen. of the United States, residing at Oswego, in the county of Oswego and State of New York, have invented certainnew and useful Improvements in and Relating to Steam- Boilers and Furnaces Therefor, of which the following is a specification.

This invention relates to certain improvements in steam generators and furnaces therefor; and the objects and nature of the invention will be understood by those skilled in the art in the light of the following explanation of the accompanying drawings illustrating what I now believe to be the preferred embodiments'or mechanical expressions of my invention from among other constructions, and arrangements within the spirit and scope of the invention.

It is an object of the invention to provide steam generators of the horizontal cylindrical-shell fire-tube type, with their principal heating surfaces as near thev water level or top surface as possible and with return fire tubes through the lower portion of the water space.

A further object of the invention is to provide certain improvements in horizontal fire tube steam generators whereby the principal submerged heating surfaces will be located near the steam spaces within such generators and approximately just below the surface of the water and whereby the furnaces will be arranged eXteriorly of such generators.

A further object of the invention is to provide a steam generator of the horizontal (approximately) fire tube type, having an exterior furnace, of such construction and arrangement that the generator can be built of any desired length and the return gases can be passed through the generator and thereby utilized even though the temperature of such gases has fallen almost to that of the water in the generator.

in the top portion of the shell, and wherein the return gases are utilized to heat the Water in the lower part of the shell and thereby perform approximately the func tions of a feed water heater.

A further object of the invention is to provide improvements in furnaces particularly designed to supply hot or burning gases to fire passages through the upper portions of the water spaces of approximately horizontal steam generators and to take care of the return gases discharged at the fronts of the generators from fire or smoke tubes through the lower portions of the generators.

A further object of the invention is to provide certain improvements in steam generators and their furnaces, for the purpose of increasing the 'efiiciency of steam boiler plants.

The invention consists in certain novel features in construction and in combinations and arrangements as more fully and particularly set forth and pointed out hereinafter.

Referring to the accompanying drawings: Figure 1, is a vertical longitudinal section through a steam generating plant constructed in accordance with my invention. Fig.2, is a vertical cross section on the line 2-2, Fig. 1. Fig. 3, is a longitudinal vertical section of the boiler. Fig. 4, is an end view of the boiler.

In the particular embodiment of my invention illustrated by the drawings, I show a steam boiler or generator having a horizontally disposed cylindrical shell 1, formed with end heads 2, 3, at the front and rear ends of the shell. The upper portion of the interior of the shell forms the steam storage space a, above the top surface or level of the water in the shell. Any suitable means such as 4, can be provided through which steam can be taken off from the storage space for utilization. The principal heating surfaces within this shell, are, in the example illustrated, formed by several large fire flues 5 extending longitudinally throughout the length of the shell and opening through the end heads, and located in the upper part of the water space near the top surface of the water, or in other words the highest portions of the walls of said flues'are located approximately just below the water level in the shell so that the fines will be always covered by or submerged and into the steam stora e $321.06. O

in the water. In the example illustrated the heads 2-, 3, of the boiler shell are formed with openings alined with said fines and surrounded b y rearwardly extending annular flanges receiving the ends of'the fines and by which the fines are secured to said heads. posed of several alined cylindrical sections secured together at their ends by suitable expansion joints 6.

For purposes of illustration, I show three similar parallel uniformly spaced fire fines 5, arranged side by side with their longitudinal axes in a common horizontal plane located a distance above the plane of the horizontal diameter of the boiler shell; the flues being approximately of the same internal diameer throughout their lengths.

The lower portion of the boiler is provided with a multiplicity of comparatively small closely arranged smoke or return tubes '7, extending longitudinally throughout the length of the water spaces of the shell and opening through and secured in the heads 2 and 3. These tubes are preferably located a distance below the fire flues and below the horizontal plane of the horizontal diameter of the shell.

If so desired, the shell can be braced and strengthened by stay bolts 8, extending longitudinally throughout the interior of the upper part of the shell and secured to the end heads thereof. I show a number of such bolts arran ed in parallelism in the space above the fines, and spaced from the fire fines and the top of the shell.

The boiler is adapted to be so set and arranged with respect to a suitable furnace,

that the intensely hot products or burning gases will enter the front ends of the fire fines and pass therethrough and from the rear ends thereof and so that the resulting return products will pass down at the rear of the boiler and forwardly through the smoke tubes and discharge therefrom at the front of the boiler.

The fire flues constitute the principal or main heating surfaces of the boiler and material advantages are thereby attained inasmuch as these surfaces are located near the water level in the boiler and hence the vaprr bubbles that form on these surfaces become quickly detached therefrom and rapidly move upwardly to discharge the vapor or steam at the surface of the water Those skilled in the art will. appreciate the advantages of such an arrangement and the eflic ency thereby attained.

The smoke tubes through which the re turn products pass forwardly from the rear of the bciler act in effect as a feed water heater on the water in the lower part of the boiler to raise the temperature of the water below the principal heating surfaces If so desired, each flue can be comand thus causing the water in the lower portion of the boiler to expand and ascend into contact with said principal heat ng surfaces, hence these return products will perform a useful function in the boiler at any temperature so long as such temperature is above or higher than the temperature of water surrounding said smoke tubes. This statement however, is not true of those boilers heretofore employed wherein the re turn smoke tubes pass through the upper portion of the body of water in the boiler. In such boilers, of the character last mentioned, the-length of the boiler is restricted and necessarily so in order that the temperatureof the return products be above that of the upper portion of the body of water in the boiler, and hence the escaping products that pass to the chimney will be of very high temperature, as it would be a detrimentto employ such a boiler of a length to absorb the temperature of the return gases down to approximately the temperature of the steam.

By arranging the principal heating surfaces at the upper portion of the boiler, that is, near the surface of the water, and then passing the return products forwardly through the lower portion of the boiler, I remove the above mentioned restriction as to the length of the boiler, inasmuch as it is not a detriment in my boiler if the tempera ture of the return products has dropped to a point below the temperature of the steam so long as the temperature of such products does not drop below that of the temperature of the lower part of the boler. Boilers constructed in accordance with my invention can be built of greatly increased length in comparison to the limits as to length necessitated by conditions where the return fines are in the upper porti n of the boiler. Advantages are also attained by providing the large diameter the fines arranged in a horizontal row in the water just below the surface thereof.

Tn Figs. 1 and 2, T disclose the boiler setting and furnace arrangement preferably emplovedin view of the peculiarities of construction involved in the boiler disclosed. In this arrangement. the boiler is pro ided with suitable saddles 9. resting on pedestals or bases 10, the saddles being preferably arranged distances inwa dly from the ex treme ends of the boiler shell. Said xtreme ends of the shell rest on walls 11. The furnace is arranged at the front end of the boiler and comprises an suitable fire box 12, furnace front 1%, bridge wall 14-, and top arch 16. The bridge wall is approximately parallel with the front end of the boiler shell and is spaced forwardly a distance therefrom. An upwardly and rearwardiy extending arch 15, is provided between the upper end of the bridge wall and the front end of the boiler shell to cut the burning gases in the furnace from the front ends of the smoke tubes and to direct said gases into the front ends of the fire flues. This arch 15, extends completely across the furnace and in effect forms an upward and rearwardly curving continuation of the bridge wall engaging at its upper rear edge the front end of the boiler shell along the horizontal line interposed between the front ends of the top row of smoke tubes and the lower edge portions of the front openings into the fire flues. The top arch 16, of the furnace is usually inclined upwardly and rearwardly, and is extended rearwardly above the arch 15, and to the front end-0f the boiler shell which it fits on a horizontal line just above the front open ends of the fire flues. The rear portion of the top arch of the furnace cooperates withthe arch l5,

in forming a combustion chamber or throat b, in rearward extension of the combustion chamber above the fuel bed of the furnace, designed to promote complete mixture, ignition and perfect combustion ofthe gases before being delivered into the fire flues of the boiler to attain perfect combustion and the highest possible temperature permitted within the combustion or fire flues of the boiler, whereby efiiciency and economy will be attained. To the rear of the boiler shell I arrange an arch, closure or partition 18, to form a chamber or return passage 0, at the rear end of the boiler shell to receive the products from the fire flues and to deliver such products downwardly to the rear ends of the smoke tubes. This wall or arch 18, can be formed with an opening normally closed by door 19, through which access can be had to the smoke tubes. At the front of the boiler shell, I provide a chamber (Z, into which the products from the front ends of the smoke tubes are discharged. This chamber d, can be connected in any suitable manner to the stack or chimney for carrying off the products that escape from the boiler. In the particular example illustrated, the off take chamber or smoke flue d, is located below the arch 15, and between the bridge wall 1 1-, and the lower portion of the front end of the boiler shell and is extended laterally below the furnace walls and arches to any suitable off take stack, not shown. The discharge from the smoke chamber cl, can be provided for in any suitable manner as by an under ground flue, that is, a flue arranged below the floor, or by a flue extending along the floor laterally of the furnace to any suitable point.

Any suitable means can be provided to form the return chamber 0, at the rear end of the boiler shell, although as before described, I show this chamber formed between the rear end of the boiler shell and a wall erected on the floor and terminating in an arch extending forwardly into engagement with the rear end of the shell on a line above the rear ends of the fire flues.

It is evident that various changes, modifications and departures might be resorted to without departing from the spirit and scope of my invention and hence I do not wish to limit myself to the exact disclosures hereof.

Desiring to protect my invention in the broadest manner legally possible, what I claim is 1. A steam boiler of the horizontally-disposed cylindrical shell type, having fire flues extending therethrough approximately just below the surface of thewater therein, and Smoke tubes extending through the lower portion of said boiler, in combination with afurnace arranged in front of the boiler and having a combustion chamber or throat delivering the burning gases to the front ends of said fines and having a smoke chamber at the front ends of said tubes with an offtake discharge, and a wall in rear of the boiler and forming a return chamber from the rear ends of said flues to the rear ends of said tubes.

2. A steam boiler furnace having a top arch and a bridge wall with an upwardly and rearwardly extending arch from the bridge wall to the front end of the boiler to form a rearwardlv extending combustion chamber to deliver the burning gases to fire flues of the boiler, and also forming a smoke discharge chamber at the front ends of smoke tubes in the lower portion of the boiler, said smoke chamber being arranged below said arch and between said bridge wall and the front end of the boiler, in combination with a boiler having fire fines approximately just below the water level and return smoke tubes in its lower portion.

'3. A boiler of the fire tube horizontally disposed type, having fire flues in its upper portion and smoke tubes in its lower portion, in combination with a furnace arranged in front thereof and having a rearwardly extending combustion chamber to deliver the burning gases to the fire flues of the boiler, said combustion chamber having its lower wall formed by an upwardly and rearwardly extending arch, forming a bottom smoke discharge to receive the products from the front end of the smoke tubes of the boiler.

4- A steam boiler of the cylindrical externally fired type, having longitudinal fire and combustion flues arranged approximately just below the water level, and a multiplicity of relatively small longitudinal smoke tubes through the lower portion of the water space of the boiler.

5. A cylindrical externally fired steam boiler having end heads and longitudinal fire and combustion fiues extending through the upper portion of the. Water space of the boiler and carried by and opening through said heads and return smoke passages carried by and opening through said heads and extending longitudinally throughout the portion of the Water space of the boiler beloW said flues.

6. An externally fired cylindrical steam boiler having its principal heating surfaces in its water space approximately just below the Water level and having return smoke passages through the lower portion of, its Water space, in combination With a furnace arranged in front of said boiler and having a combustion chamber to deliver the burning gases to said heating surfaces and also having a smoke discharge chamber at the front ends of said passages, and means at the rear of the boiler forming a return chamber from said heating surfaces to the r ar ends of said passages.

7. An externally-fired steam boiler having exterior end heads and relatively large com bustion and fire fiues joined to said heads and forming its principal heating surfaces in its upper portion approximately just below the Water level and having return smoke tubes joined to said heads and extending through the lower portion of the body of Water, said flues and tubes extending throughout the full length of the boiler.

8. A steam boiler of the externallyfired type, for use in connection Withan exterior front furnace and off take passage and an exterior rear smoke chamber, said boiler having a steam storage space at its top, said boiler having a relatively large combustion and smoke flue near said space and just below the surface of the Water in the boiler for the purposes described, and means for carrying the return products through the lower portion of the boiler to perform approximately thefunctions of a feed Water heater.

9. A steam boiler of the horizontally-dis posed approximately cylindrical externallyfired fire-tube type, having relatively large diameter fire flues uniformly arranged ap proximately just below the Water level in the boiler and small diameter smoke tubes arranged in the lower portion of the boiler.

10. An externally fired steam boiler having end heads'and an approximately cylindrical shell adapted to be arranged horizontally, a horizontal row of similar spaced large diameter combustion and fire flues extending throughout the length of said boiler above the horizontal plane of the horizontal diameter thereof and approximately uniformly arranged With respect to the Water level and forming the principal heatingsurfaces of the boiler, and a multiplicity of small diameter smoke tubes extending throughout the length of said boiler below said horizontal plane.

.11. A steam boiler of the externally-fired type having an approximately cylindrical, shell and end heads, a multiplicity ofrela tively small diameter smoke tubes extending longitudinally throughout the length of the lower portion of said shell and secured to said heads, a mutiplicity of stay bolts extending longitudinally throughout the upper portion of said shell and secured to said heads, and a row of relatively large diameter fire tlues secured to said head and extending throughout the length of the boiler between and spaced from said tubes and said bolts, and arranged approximately just below the Water-level andforming the principal heating surfaces of the boiler, substantially as described.

In testimony whereof I aflix my signature in presence of two Witnesses.

. ROBERT JOY. Witnesses;

EDWARD HEHRLEIN, Gno. M. BENNETT, Sr.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

